Service Brake - Hitachi ZW180 Technical Manual

SERVICE BRAKE

The brake is the wet type multi-disc brake and is as-
sembled in the differential gear body of the axle. Four
wheels of this vehicle has the disc brake respectively.
•
In Operation of Brake
Oil pressure from the brake valve acts on the back
of brake piston (5) and moves brake piston (5).
Brake disc (3) and brake ring (2) are compressed.
The inner surface of brake disc (3) is fitted to gear &
shaft (7). The outer surface of brake ring (2) is fixed
to differential gear body (4). Therefore, the rotation
of the pushed and compressed brake disc (3) stops,
and the vehicle stops.
•
In Release of Brake
When oil pressure from the brake valve is de-
creased, brake piston (5) is returned by return
spring (6). Brake disc (3) is freed and the vehicle
can travel.
COMPONENT OPERATION / Axle
T3-10-10